Film with bulge for computer keyboard or flexible printed circuit and bulge forming process thereof

Abstract

The invention relates to the technical field of production of input equipment, in particular to a bulge forming process of a film with a bulge for a computer keyboard or a flexible printed circuit. A light transmission hole is arranged at the top part of the bulge; and light shading film materials are attached on the upper surface or the lower surface of the bulge per se. The bulge forming process comprises the following steps of: firstly, designing a bulge forming mould according to the materials required to be formed, the bulge shape and the dimension and determining the parameters of a key part of the forming mould; secondly, carrying out bulge forming to the materials required to be formed by using the bulge forming mould; and finally, after the completion of bulge forming, punching the light transmission hole at the top part of the bulge by adopting a punching mould, wherein the position of the light transmission hole is corresponding to the key center of the keyboard. The invention has the beneficial effect that a traditional lampshade and foam are replaced by the shape of the bulge to shield an accumulated light ray so as to realize the attractive overall appearance of the keyboard, shorten the production process, improve the production efficiency and reduce the production reject ratio and the production cost.

Description

technical field [0001] The invention relates to the technical field of input device production, in particular to a process for forming protrusions for computer keyboards with films or flexible circuits. Background technique [0002] At present, in the production process of keyboards, it is generally used to paste light-shielding lampshades, foam and other materials on the parts of the film or flexible lines that need light leakage, so that the light can penetrate through specific holes on the lampshade or foam to accumulate light and light up the keycaps. Effect. The traditional silicone lampshade is made of silicone material through molding. Because of its relatively complex structure and shape, and the high precision of the mold itself, it is difficult to control the shape and dimension accuracy of the mechanism, and the cost of the mold is also high; materials such as lampshades and foam The size itself is small, and it is not easy to operate when it is pasted with the f...

AI Technical Summary

Problems solved by technology

The traditional silicone lampshade is made of silicone material through molding. Because of its relatively complex structure and shape, and the high precision of the mold itself, it is difficult to control the shape and dimension accuracy of the mechanism, and the cost of the mold is also high; materials such as lampshades and foam The size itself is small, and it is not easy to operate when it is pasted with the film. It must be pasted, which is time-consuming and labor-intensive; the silicone and foam materials are soft and have good elasticity, and it is difficult to achieve accurate positioning. Therefore, during production It is easy to produce position deviation; the edge of the light transmission hole on the lampshade is accompanied by small burrs during production, and there will be dark shadows after the light is transmitted through the small hole, which affects the light intensity and light transmission range, and the keyboard is assembled because of its own material elasticity. Good factors affect the feel of the keyboard itself

At present, the production of this kind of technology consumes more materials, the production process is longer, the precision is difficult to control, the cost is also high, and the production time is low.

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